Polycarbonates are ironically soft despite the fact they can withstand high magnitude of impact force.
They are flexible thus,they can absorb impact energy without fracturing. Since it is naturally soft, to make it versatile,it must be coated with an anti-scratch substrate which will be able to resist abrasion.
The anti-abrasion coating does not affect the desirable properties of polycarbonates sheets. In fact, polycarbonate coating scratches resistant have become popular in most glazing applications.
These coatings ensure that the polycarbonate sheets remain in good shape with a beautiful appearance for more than 10 years,a reason why most companies offer a warranty of not less than a decade.
In most cases, silicon products are used to coat polycarbonate sheets which enhance the durability of the polycarbonate substrate.
These coatings are formulated in such a way that they can protect the PC sheets from degradation while still making them scratch resistant.
In some applications, the polycarbonate coating scratches resistant layers feature thin-glass layer with a plasma enhanced chemical vapor deposition.
This results in an extremely hard coat which can withstand hostile environmental conditions.
These hard coatings do not increase the weight of the polycarbonate sheets. In fact, the weight of the coating substrate is negligible.
Normally, as much as the harder coating may be desired for scratch resistance,it is worth noting that harder coating reduces the toughness of the overall material.
This is the main reason why this coating should be as thin as possible. Most hard coatings range between 4.0 and 6.0 micron.
The primer layer is used to make the polycarbonate scratches resistant coating products. They provide ultra-violet absorber and adhesion. They vary in thickness with the standard coat varying between 2.0 and 4.0 microns.
At times, this can result to a premature micro-cracking, which is due to thermal expansion.
Therefore, a thorough test should be conducted to ensure that the polycarbonate sheet and the coated substrate are compatible.
Thin coatings do not crack easily. The modern polycarbonate coating scratches resistive products are designed with very thin, hard coating hence, they can remain in good shape for more than 10 years.
A number of anti-abrasion polycarbonate sheets have a thickness of between 1.5mm and 12mm with a standard width of between 1200mm and 2100mm.
The most commonly available types are the clear polycarbonate anti-scratch sheets. These polycarbonate materials are mainly used in applications where good visibility is of the essence.
Apart from resisting scratches, they have been designed to resist a number of chemicals such as cleaning agents and other organic solvents.
However, it is important to adhere to the cleaning instructions by the manufacturer.
During the installation process, you need to refer to the manufacturer’s data sheet to ensure that the polycarbonate sheet is actually compatible with the applications.
There are a number of techniques which are used to determine the degree of scratch resistance of polycarbonate sheets.
Some of these tests include the ASTM pencil hardness rating, nano-scratch and transmitted haze analysis. Ideally, the exterior hard coat and clear coat show differences in scratch performances.